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Far infrared has a wavelength of 15 micrometers (µm) to 1 mm. During night-time operations, police officers with range gated near infrared cameras can read license plates at a distance of up to 1.2 km. [7] Near Infrared (NIR) cameras are available to see 50 km through fog, haze, smoke, rain. [8]
Autotrader.com, Inc. is an American online marketplace for car buyers and sellers, founded in 1997. It aggregates new, used, and certified second-hand cars from dealers and private sellers. The site also provides users with automotive reviews, shopping advice, and comparison tools for car financing and insurance information. [1]
A passive infrared sensor (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors . PIR sensors are commonly used in security alarms and automatic lighting applications.
An optical sensor converts light rays into electronic signals. It measures the physical quantity of light and then translates it into a form readable by an instrument. An optical sensor is generally part of a larger system that integrates a source of light, a measuring device, and the optical sensor. This is often connected to an electrical ...
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A nondispersive infrared sensor (or NDIR sensor) is a simple spectroscopic sensor often used as a gas detector.It is non-dispersive in the fact that no dispersive element (e.g a prism or diffraction grating as is often present in other spectrometers) is used to separate out (like a monochromator) the broadband light into a narrow spectrum suitable for gas sensing.
An early radar detector Car radar detector (Japanese) A radar detector is an electronic device used by motorists to detect if their speed is being monitored by police or law enforcement using a radar gun. Most radar detectors are used so the driver can reduce the car's speed before being ticketed for speeding.
An infrared detector is a detector that reacts to infrared (IR) radiation. The two main types of detectors are thermal and photonic ( photodetectors ). The thermal effects of the incident IR radiation can be followed through many temperature dependent phenomena. [ 2 ]